package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.BaseContext;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.dao.OrderDao;
import com.itheima.reggie.entity.*;
import com.itheima.reggie.service.*;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;

@Service
public class OrderServiceImpl extends ServiceImpl<OrderDao, Orders> implements OrderService {

    @Autowired
    private ShoppingCartService shoppingCartService;
    @Autowired
    private UserService userService;
    @Autowired
    private AddressBookService addressBookService;
    @Autowired
    private OrderService orderService;
    @Autowired
    private OrderDetailService orderDetailService;
    /**
     * 用户下单
     */
    @Override
    public void submit(Orders orders) {
        // 0、获取用户id
        Long userId = BaseContext.getCurrentId();

        // 1、查询购物车数据
        LambdaQueryWrapper<ShoppingCart> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(ShoppingCart::getUserId, userId);
        List<ShoppingCart> shoppingCartList = shoppingCartService.list(queryWrapper);
        if (shoppingCartList == null || shoppingCartList.size() == 0) {
            throw new CustomException("请选择要购买的物品再下单");
        }

        // 2、查询用户数据
        User user = userService.getById(userId);

        // 3、根据地址id查询地址数据
        AddressBook addressBook = addressBookService.getById(orders.getAddressBookId());
        if (addressBook == null) {
            throw new CustomException("用户地址信息有误，不能下单");
        }

        //生成订单号
        long orderId = IdWorker.getId();

        //设置总价属性,初始值为0
        AtomicInteger amount = new AtomicInteger(0);

        //4.组装订单明细信息
        List<OrderDetail> orderDetails = shoppingCartList.stream().map((item -> {
            OrderDetail orderDetail = new OrderDetail();
            orderDetail.setOrderId(orderId);
            orderDetail.setNumber(item.getNumber());
            orderDetail.setDishFlavor(item.getDishFlavor());
            orderDetail.setDishId(item.getDishId());
            orderDetail.setSetmealId(item.getSetmealId());
            orderDetail.setName(item.getName());
            orderDetail.setImage(item.getImage());
            orderDetail.setAmount(item.getAmount());
            amount.getAndAdd(item.getAmount().multiply(new BigDecimal(item.getNumber())).intValue());
            return orderDetail;
        })).collect(Collectors.toList());

        //5.组装订单数据
        orders.setId(orderId);
        orders.setNumber(String.valueOf(orderId));
        orders.setStatus(2);
        orders.setUserId(userId);
        orders.setOrderTime(LocalDateTime.now());
        orders.setCheckoutTime(LocalDateTime.now());
        orders.setAmount(new BigDecimal(amount.get()));
        orders.setPhone(addressBook.getPhone());
        orders.setUserName(user.getName());
        orders.setConsignee(addressBook.getConsignee());
        orders.setAddress((addressBook.getProvinceName() == null ? "" : addressBook.getProvinceName())
                + (addressBook.getCityName() == null ? "" : addressBook.getCityName())
                + (addressBook.getDistrictName() == null ? "" : addressBook.getDistrictName())
                + (addressBook.getDetail() == null ? "" : addressBook.getDetail()));

        //6.向订单表插入数据，一条数据
        orderService.save(orders);

        //7.向订单明细表插入数据，多条数据
        orderDetailService.saveBatch(orderDetails);

        // 6、删除当前用户的购物车数据
        shoppingCartService.remove(queryWrapper);
    }
}
